This document helped me a bunch and touch wood I have not bricked a machine yet.
Case 4 states the counter data will move from the spares machine to your current machine.
I have done this before. The EEPROM holds the engine data so don't move that. Else replace or move all parts from spares machine.
Or I will just replace all the ICP'c on the units in that case.
Board replacement cases.pdf - Google Drive
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